he Raspberry Pi Codec Zero Audio HAT is a compact audio add-on board designed for Raspberry Pi computers equipped with a 40-pin GPIO header. Built in the same convenient footprint as the Raspberry Pi Zero form factor, this board enables high-quality digital audio input and output for a wide range of embedded audio projects.
Powered directly through the Raspberry Pi GPIO header, the board integrates a Dialog Semiconductor DA7212 high-definition audio codec capable of delivering 24-bit, 96kHz audio performance, making it suitable for advanced audio applications including voice interfaces, smart speakers, intercom systems, and digital audio experimentation.
The board includes a built-in MEMS microphone for capturing audio input, while also supporting external microphones and speakers through dedicated connectors. A 3.5mm socket allows connection of an external mono electret microphone, while screw terminals support 1.2W 8Ω mono speakers for audio output.
Additional features such as programmable status LEDs and a tactile push button make it ideal for prototyping and embedded systems requiring user interaction. With its simple GPIO connection and no need for external power, the Raspberry Pi Codec Zero provides a convenient and reliable solution for adding high-quality audio capabilities to Raspberry Pi projects.
Typical applications include walkie-talkie systems, smart doorbells, voice-controlled assistants, audio streaming devices, and retro radio projects, making it a powerful development tool for engineers, makers, and educators.
Key Features
- High-Definition Digital Audio Codec
Integrates the Dialog Semiconductor DA7212 codec delivering 24-bit / 96kHz high-quality audio processing for professional-level digital audio applications.
- Direct GPIO Interface with Raspberry Pi
Connects directly to the 40-pin GPIO header and communicates through the I2S digital audio interface, eliminating the need for external sound cards.
- Integrated MEMS Microphone
Built-in microphone allows immediate audio capture for voice commands, communication systems, and sound detection projects.
- External Audio Input and Output Support
Supports external mono electret microphones via 3.5mm jack and 1.2W 8Ω speakers via screw terminals, allowing flexible audio project configurations.
- Programmable LEDs and User Button
Includes green and red GPIO-controlled LEDs along with a tactile push button for status indication and user interaction in embedded applications.
- Compact Raspberry Pi Zero Form Factor
Slim board design measuring 65mm × 31mm, making it ideal for portable Raspberry Pi builds and compact embedded systems.
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